Is it just me, or the sync tool in Now Contact 5.3 broken under Leopard?

I just want to 1-way sync to Addressbook, and no new people show up, despite what the tool says...

Interestingly, updates do seem to make it over.

The Address Book Sync is not currently supported on 10.5. A dialog box comes up stating this. Your post says the tool is saying something else - what is it saying? Can you give more details on what steps you are taking?